He added, "Don't Blame Him. People Are Actually Evil Swearing Up And Down That It Was Who It Wasnt."

Bieber tweeted a response -- "All good buddy. i deal with this everyday. thanks though. the baby aint mine either."

Tyler's message was clearly intended for Johnson -- who told TMZ he personally witnessed Justin in the driver's seat after the car dangerously sped through their gated community. We're told at least 3 other people also saw Justin behind the wheel.

Either way, the residents of Justin's neighborhood are PISSED -- and are threatening to withhold their HOA dues until the community takes action against Bieber.